干旱区生态环境知识资源中心(Arid): 胡杨和灰胡杨叶绿素荧光特性对地下水位的生态响应

Arid

	胡杨和灰胡杨叶绿素荧光特性对地下水位的生态响应
其他题名	Ecological responses of chlorophyll fluorescence characteristics of Populus euphratica and Populus pruinosa to groundwater level in upper reaches of Tarim River
	王海珍 1; 陈加利 2; 韩路 1
来源期刊	干旱地区农业研究
ISSN	1000-7601
出版年	2013
卷号	31 期号:3 页码:166-172
中文摘要	选取塔里木河上游不同地下水位的样地作为研究点,利用便携式调制叶绿素荧光仪测定了不同地下水位下胡杨、灰胡杨的叶绿素荧光特性和PSⅡ光合活性。结果表明:随地下水位下降,胡杨、灰胡杨表观光合电子传递速率(ETR)、实际光化学量子效率(Phi_(PSⅡ))、光化学猝灭系数(qP)、光化学速率(PCR)、最大荧光(Fm)和PSⅡ潜在光合活性等参数普遍降低;而非光化学猝灭系数(NPQ)、调节性能量耗散量子产量(Y_(NPQ))、非调节性能量耗散量子产量(Y_(N0))、叶片光合功能相对限制值(PED)和光系统间激发能分配不平衡偏离系数(beta/alpha-1)显著升高,但其最大光化学量子产量(Fv/Fm)总体处于相对适宜状态(>0.815)。表明两树种PSⅡ光合活性随地下水位下降而降低,光能捕获效率与光化学反应能量下降,耐受强光能力减弱,获取过剩光能程度和PSⅡ受损风险增加。但两树种可通过良好的抗逆性和自我调节机制,增强热耗散来缓解光能过剩带来的损伤,从而使PSⅡ未发生不可逆损伤,保持其较高的光合效率。比较不同地下水位下胡杨和灰胡杨的叶绿素荧光参数发现,胡杨PSⅡ反应中心活性与光化学效率较高、耐旱性较强,表明胡杨对荒漠干旱环境的适应性强于灰胡杨。
英文摘要	In attempt to explore the correlation between Chlorophyll fluorescence characteristics of Populus euphratica and Populus pruinosa to groundwater level, Chlorophyll fluorescence characteristics and PSⅡ photosynthetic activities of Populus euphratica and Poulus pruinosa under different groundwater depths in the upper reaches of Tarim River were measured with a portable fluorometer. The results showed that photosynthetic electron transportation rate(ETR), actual photochemical efficiency of PSⅡ in the light(Phi_(PSⅡ)), photochemistry quenching(qP), photochemical rate(PCR),maximal fluorescence(Fm) and potential photosynthetic activity(Fv/Fo) of two tree species were decreased, while non-photochemistry quenching(NPQ), yield for dissipation by down-regulation (Y_(NPQ)), yield of other non-photochemical losses(Y_(N0)), relative limitation of photosynthesis(PED), and deviation from full balance between PSⅠ and PSⅡ(beta/alpha-1) were increased remarkably with decreasing groundwater level. Their maximal photochemical efficiencies of PSⅡ(Fv/Fm) were maintained at an optimal value(>0.815). The results showed the PSⅡ photosynthetic activity, photochemical efficiency and photochemical reaction energy of two tree species declined with the increasing groundwater depth, whereas the ability to withstand high light intensity were decreased, which would result in greater excess of excited energy and increasing the potential risk of light injury. However, two species employed the stress-resistance and self-regulation mechanism to enhance heat dissipation and alleviate injury on PSⅡ. Thus, two species could keep higher photosynthetic efficiency in desert arid environment. The comparison of chlorophyll fluorescence parameters of P.euphratica and P.pruinosa indicated that, at different groundwater depths, P.euphratica had higher PSⅡ photosynthetic activity, photochemical efficiency and drought-resistance ability, which indicated that P.euphratica had a better ecologically adaptation mechanism to desert environment than P.pruinosa. Currently, the desert dominant species grow normally at 5 m groundwater level in the upper reaches of Tarim River.
中文关键词	胡杨 ; 灰胡杨 ; 叶绿素荧光参数 ; 地下水位 ; 生态响应
英文关键词	Populus euphratica Poulus pruinosa chlorophyll fluorescence parameters groundwater level ecological adaptation mechanism
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4867661
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229479
作者单位	1.塔里木大学植物科学学院, 新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室, 阿拉尔, 新疆 843300, 中国; 2.塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国
推荐引用方式 GB/T 7714	王海珍,陈加利,韩路. 胡杨和灰胡杨叶绿素荧光特性对地下水位的生态响应[J],2013,31(3):166-172.
APA	王海珍,陈加利,&韩路.(2013).胡杨和灰胡杨叶绿素荧光特性对地下水位的生态响应.干旱地区农业研究,31(3),166-172.
MLA	王海珍,et al."胡杨和灰胡杨叶绿素荧光特性对地下水位的生态响应".干旱地区农业研究 31.3(2013):166-172.